DATA AVAILABILITY STATEMENT The data that support the findings of this study are available from the corresponding author upon reasonable request. Supporting Information Filename Description uog70174-sup-0002-TableS1.xlsxExcel 2007 spreadsheet , 18 KB Table S1 Cases of termination of pregnancy. uog70174-sup-0001-FigureS1.pngPNG image, 41.4 KB Figure S1 Cord-blood hemoglobin levels before and after first or second in-utero transfusion, according to perinatal outcome. REFERENCES 1, , , et al.